An ecumenical council, also called general council, is a meeting of bishops and other church authorities to consider and rule on questions of Christian doctrine, administration, discipline, and other matters in which those entitled to vote are convoked from the whole world (oikoumene) and which secures the approbation of the whole Church.
The Ecumenical Patriarch of Constantinople is the archbishop of Constantinople and primus inter pares among the heads of the several autocephalous churches that comprise the Eastern Orthodox Church. The ecumenical patriarch is regarded as the representative and spiritual leader of the Eastern Orthodox Christians worldwide. The term ecumenical in the title is a historical reference to the Ecumene, a Greek designation for the civilised world, i.e. the Roman Empire, and it stems from Canon 28 of the Council of Chalcedon.
Patriarchate is an ecclesiological term in Christianity, designating the office and jurisdiction of an ecclesiastical patriarch. According to Christian tradition three patriarchates were established by the apostles as apostolic sees in the 1st century: Rome, Antioch, and Alexandria. Constantinople was added in the 4th century and Jerusalem in the 5th century. Eventually, together, these five were recognised as the pentarchy by the Council of Chalcedon in 451.
The Ecumenical Patriarchate of Constantinople is one of the fifteen to seventeen autocephalous churches that together compose the Eastern Orthodox Church. It is headed by the Ecumenical Patriarch of Constantinople.
The Armenian Apostolic Church is the autocephalous national church of Armenia. Part of Oriental Orthodoxy, it is one of the most ancient Christian institutions. The Kingdom of Armenia was the first state in history to adopt Christianity as its official religion under the rule of King Tiridates III, of the Arsacid dynasty in the early 4th century.
The Armenian Catholic Church is an Eastern Catholic particular church sui iuris of the Catholic Church. It accepts the leadership of the bishop of Rome, and is therefore in full communion with the universal Catholic Church, including the Latin Church and the 22 other Eastern Catholic Churches. The Armenian Catholic Church is regulated by Eastern canon law, summed up in the Code of Canons of the Eastern Churches.
Patriarch of the West is one of the official titles of the Bishop of Rome, as patriarch and highest authority of the Latin Church.
Miaphysitism is the Christological doctrine that holds Jesus, the Incarnate Word, is fully divine and fully human, in one nature (physis). It is a position held by the Oriental Orthodox Churches. It differs from the Dyophysitism of the Catholic Church, Eastern Orthodox Churches, and the major Protestant denominations as defined by the Council of Chalcedon in 451, which holds that Jesus is one "person" in two "natures", a divine nature and a human nature.
Non-Chalcedonian Christianity comprises the branches of Christianity that do not accept theological resolutions of the Council of Chalcedon, the Fourth Ecumenical Council, held in 451. Non-Chalcedonian denominations reject the Christological Definition of Chalcedon, for varying reasons. Non-Chalcedonian Christianity thus stands in contrast to Chalcedonian Christianity.
Pentarchy was a model of Church organization formulated in the laws of Emperor Justinian I of the Roman Empire. In this model, the Christian Church is governed by the heads (patriarchs) of the five major episcopal sees of the Roman Empire: Rome, Constantinople, Alexandria, Antioch, and Jerusalem.
In the history of Christianity, the first seven ecumenical councils include the following: the First Council of Nicaea in 325, the First Council of Constantinople in 381, the Council of Ephesus in 431, the Council of Chalcedon in 451, the Second Council of Constantinople in 553, the Third Council of Constantinople from 680 to 681 and finally, the Second Council of Nicaea in 787. All of the seven councils were convened in what is now the country of Turkey.
The Oriental Orthodox Churches are Eastern Christian churches adhering to Miaphysite Christology, with approximately 50 million members worldwide. The Oriental Orthodox Churches adhere to the Nicene Christian tradition. Oriental Orthodoxy is one of the oldest branches in Christianity.
In the 5th century in Christianity, there were many developments which led to further fracturing of the State church of the Roman Empire. Emperor Theodosius II called two synods in Ephesus, one in 431 and one in 449, that addressed the teachings of Patriarch of Constantinople Nestorius and similar teachings. Nestorius had taught that Christ's divine and human nature were distinct persons, and hence Mary was the mother of Christ but not the mother of God. The Council rejected Nestorius' view causing many churches, centered on the School of Edessa, to a Nestorian break with the imperial church. Persecuted within the Roman Empire, many Nestorians fled to Persia and joined the Sassanid Church thereby making it a center of Nestorianism. By the end of the 5th century, the global Christian population was estimated at 10-11 million. In 451 the Council of Chalcedon was held to clarify the issue further. The council ultimately stated that Christ's divine and human nature were separate but both part of a single entity, a viewpoint rejected by many churches who called themselves miaphysites. The resulting schism created a communion of churches, including the Armenian, Syrian, and Egyptian churches, that is today known as Oriental Orthodoxy. In spite of these schisms, however, the imperial church still came to represent the majority of Christians within the Roman Empire.
Christianity in late antiquity traces Christianity during the Christian Roman Empire — the period from the rise of Christianity under Emperor Constantine, until the fall of the Western Roman Empire. The end-date of this period varies because the transition to the sub-Roman period occurred gradually and at different times in different areas. One may generally date late ancient Christianity as lasting to the late 6th century and the re-conquests under Justinian of the Byzantine Empire, though a more traditional end-date is 476, the year in which Odoacer deposed Romulus Augustus, traditionally considered the last western emperor.
The Metropolis of Chalcedon is an ecclesiastical territory (diocese) of the Ecumenical Patriarchate of Constantinople. Christianity spread in Chalcedon during the 2nd century AD. The city was initially the see of a bishopric before being promoted to a metropolis at 451 AD, at the time of the Fourth Ecumenical Council. In 2005, it was the senior of the four remaining active Greek Orthodox Church metropolises of the Ecumenical Patriarchate in Turkey and the only one surviving in Asia Minor (Anatolia). As of 2024, it is numbered as the senior of nine active Metropolises that are active in Türkiye, after the Archdiocese of Constantinople-New Rome.
The First Council of Dvin was a church council held in 506 in the city of Dvin. It convened to discuss the Henotikon, a christological document issued by Byzantine emperor Zeno in an attempt to resolve theological disputes that had arisen from the Council of Chalcedon.
The Third Council of Dvin was a church council held in 607 in the city of Dvin.
The Fourth Council of Dvin was a Church Council held in Dvin the ancient capital city of Armenia in 648. The council was presided over by Catholicos Nerses III of Ishkhantsi (641-661) and was attended by 17 participating bishops.
The Council of Thedosioupolis was a church synod held at Erzurum, in Armenia between February 631 and February 632 AD.
The Council of Partav was a church synod held in about 703 in Caucasian Albania. The Council condemned the Georgian Church's adherence to the decision of the Council of Chalcedon. and was an important step in the schism between the Armenian Church and the Byzantine and Georgian Churches.
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